steinberger.h

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// ------------------------------------------------------
//
// SPDX-License-Identifier: GPL-2.0-or-later
//
// SPDX-FileCopyrightText: Copyright (C) 2011-2026 by the ASPECT authors.
//
// This file is part of ASPECT.
//
// Detailed license information governing the source code and
// contributions can be found in the folder LICENSES and in
// LICENSE and CONTRIBUTING.md at the top level directory.
//
// ------------------------------------------------------

#ifndef _aspect_material_model_steinberger_h
#define _aspect_material_model_steinberger_h

#include <aspect/material_model/interface.h>
#include <aspect/material_model/equation_of_state/thermodynamic_table_lookup.h>
#include <aspect/material_model/thermal_conductivity/interface.h>
#include <aspect/material_model/rheology/drucker_prager.h>
#include <aspect/material_model/utilities.h>

#include <aspect/simulator_access.h>
#include <deal.II/fe/component_mask.h>

namespace aspect
{
  namespace MaterialModel
  {
    namespace internal
    {
      class LateralViscosityLookup
      {
        public:
          LateralViscosityLookup(const std::string &filename,
                                 const MPI_Comm comm);

          double lateral_viscosity(double depth) const;

          int get_nslices() const;
        private:
          std::vector<double> values;

          double min_depth;
          double delta_depth;
          double max_depth;
      };

      class RadialViscosityLookup
      {
        public:
          RadialViscosityLookup(const std::string &filename,
                                const MPI_Comm comm);

          double radial_viscosity(double depth) const;

        private:
          std::vector<double> values;

          double min_depth;
          double delta_depth;
          double max_depth;
      };
    }

    template <int dim>
    class Steinberger: public MaterialModel::Interface<dim>, public ::aspect::SimulatorAccess<dim>
    {
      public:
        void
        initialize () override;

        void update() override;

        bool is_compressible () const override;
        void
        evaluate(const MaterialModel::MaterialModelInputs<dim> &in,
                 MaterialModel::MaterialModelOutputs<dim> &out) const override;

        static
        void
        declare_parameters (ParameterHandler &prm);

        void
        parse_parameters (ParameterHandler &prm) override;
        void
        create_additional_named_outputs (MaterialModel::MaterialModelOutputs<dim> &out) const override;


      private:
        double viscosity (const unsigned int q,
                          const std::vector<double> &volume_fractions,
                          const MaterialModel::MaterialModelInputs<dim> &in,
                          MaterialModel::MaterialModelOutputs<dim> &out) const;

        bool has_background_field;

        std::unique_ptr<ComponentMask> composition_mask;

        EquationOfState::ThermodynamicTableLookup<dim> equation_of_state;

        bool use_lateral_average_temperature;

        std::unique_ptr<ThermalConductivity::Interface<dim>> thermal_conductivity;

        std::vector<double> viscosity_prefactors;
        MaterialUtilities::CompositionalAveragingOperation viscosity_averaging_scheme;

        std::vector<double> average_temperature;
        unsigned int n_lateral_slices;

        double min_eta;
        double max_eta;
        double max_lateral_eta_variation;

        std::string data_directory;
        std::string radial_viscosity_file_name;
        std::string lateral_viscosity_file_name;

        std::unique_ptr<internal::LateralViscosityLookup> lateral_viscosity_lookup;

        std::unique_ptr<internal::RadialViscosityLookup> radial_viscosity_lookup;

        void fill_prescribed_outputs (const unsigned int i,
                                      const std::vector<double> &volume_fractions,
                                      const MaterialModel::MaterialModelInputs<dim> &in,
                                      MaterialModel::MaterialModelOutputs<dim> &out) const;

        Rheology::DruckerPrager<dim> drucker_prager_plasticity;
        bool enable_drucker_prager_rheology;
        Rheology::DruckerPragerParameters drucker_prager_parameters;

    };
  }
}

#endif